Nitin

I live in middle east. The brands available are TOYO, Hankook, Bridgestone, Michelin, Yokohama.

The average temp in summers is 40C and in winters is 20C.(no snow here )

Sugeest best value for money. Michelins are extremely costly here.

I have wineglass rims with 215/55/16. Can I fit 225/50/16?.
In my previous post, I have mentioned I have body roll problems. Will fitting a wider tyre like 225 cure a bit? What if I fit 205 tyre(as comes in stock 2.8)
Its a 2.8 non Q, 2000MY. Donot direct me to tirerack.com. I have seen it. I am asking for your opinions.

ex-quattro PETE

First of all, changing tires will not cure your body roll problems. You'd have to upgrade your suspension and anti-sway bars to fix this.

Actually, getting tires that have more grip (wider ones, or just more grippy ones), will make the body roll worse. The body will be trying to go sideways in turns, but the tires won't let it because they now have more grip. As a result, when you push the car in turns, the body will roll while waiting for the tires to let go and start sliding sideways.

As for tires, if you're just looking for summer-only tires (no snow capabilities), then there are plenty of choices:

Toyo T-1S
Bridgestone S-03
Yokohama AVS ES100
(from the brand choices that you provided)

However, these are very performance-oriented. While they grip very well and provide quick steering response, they may not be the most comofortable for highway-cruising. For more comfort, I'd look at Bridgestone RE950, Yoko AVS dB, Dunlop SP9000, or even Dunlop SP A2. This last one, while the least-performance oriented of the group, will last you the longest and offers a great bang for the buck. I see a lot of 5-series BMWs run on SP A2s.